speed of light in a vacuum

symbol: $c$
https://doi.org/10.1351/goldbook.S05854
The speed of light in vacuum, \(c\), is one of seven fixed constants defining the International System of Units, the SI, with \(c = \pu{299792458 m s-1}\). The speed of light is considered as a fundamental constant of nature.
Source:
BIPM, The International System of Units, SI Brochure, 9th ed. (2019), p. 127 [Terms] [Book]
Citation: 'speed of light in a vacuum' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.S05854 RIS BibTex EndNote
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